40649236164 has 36 divisors (see below), whose sum is σ = 102821194476. Its totient is φ = 13540651968.

The previous prime is 40649236127. The next prime is 40649236211. The reversal of 40649236164 is 46163294604.

40649236164 is a `hidden beast` number, since 4 + 0 + 6 + 4 + 9 + 23 + 616 + 4 = 666.

40649236164 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 30192537600 + 10456698564 = 173760^2 + 102258^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 324399 + ... + 431894.

It is an arithmetic number, because the mean of its divisors is an integer number (2856144291).

Almost surely, 2^40649236164 is an apocalyptic number.

It is an amenable number.

40649236164 is an abundant number, since it is smaller than the sum of its proper divisors (62171958312).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40649236164 is a wasteful number, since it uses less digits than its factorization.

40649236164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 757796 (or 757791 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 45.

The spelling of 40649236164 in words is "forty billion, six hundred forty-nine million, two hundred thirty-six thousand, one hundred sixty-four".